oh oh, I tried that once... If you have NOT processed your hair yet, I think you might achieve a result close to the commercial. I, on the other hand, had growing out highlights in different shades (my natural hair color is.. oh wait... I don't remember anymore) and it turned out to be a disaster. As I'm stubborn, I bought another box and tried to fix it. Well, ended up at the hairdresser's chair anyway
